Vital weapon swap suggestion

It bothered me in every game with multiple weapon sets mechanic.

PLEASE, allow to use the same item in both sets!
Maybe I wont to switch only one item.
Maybe I wont to switch only a passive tree.
Maybe I wont to switch between wand+scepter (offense) and scepter+shield (defense) with the same scepter. Why would I need another scepter for that?

P.S. If it's already implemented, please tell me how, and sorry.

I think that goes beyond the scope of weapon swapping. But yeah, it would be kind of nice if we could switch between passive sets without having to also switch weapons.

I will selflessly bump this thread until I get bored.